maskedtextbox use validatingtype - Equipment needed carbon dating

Most processes that we are familiar with are like sand in an hourglass.In exponential decay the amount of material decreases by half during each half-life.

Radiometric dating techniques indicate that the Earth is thousands of times older than that--approximately four and a half billion years old.

Many Christians accept this and interpret the Genesis account in less scientifically literal ways.

Some of the atoms eventually change from one element to another by a process called radioactive decay.

If there are a lot of atoms of the original element, called the parent element, the atoms decay to another element, called the daughter element, at a predictable rate.

When the glass is turned over, sand runs from the top to the bottom.

Radioactive atoms are like individual grains of sand--radioactive decays are like the falling of grains from the top to the bottom of the glass.

Wiens has a Ph D in Physics, with a minor in Geology.

His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.

The passage of time can be charted by the reduction in the number of parent atoms, and the increase in the number of daughter atoms.

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